Method of forming curved m etallic pipes



(No Model.) 2 sheets-4mm; 1.

W. J. BRADY.

METHOD OF FORMING (JURVED METALLIC PlPEs.

No. 337,475. Patented Mar. 9, 1886.

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(No Model.) 2 Sheets-Sheet 2.

' W. J BRADY.

METHOD OF FORMING GURVED METALLIG PIPES.

Patented Mar. 9, 1886. 4

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METHOD OF FORMING CURVED'METALLIC PIPES.

SPECIFICATION forming part of Letters Patent No. 337375. dated March 9, 1886.

Application filed August 11, 1885. Serial No. 174,160.

To all whom it may concern:

Be it known that I, WILLIAM J. BRADY, a resident of the city and county of San Francisco, State of California, have invented an Improved Method of Forming Elbows and Curves in IVrought-Iron Pipes and Tubes; and I hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings.

My invention relates to a simple and ready method of forming bends, elbows, and curves in wrought-iron piping andtubing formed of riveted joints, by the use of a shaping-spline, a parallel made of some suitable elastic wood or hard rubber, without the aid of elaborate drawings and prolonged calculations.

The iollowing description fully explains the nature of my said invention and the manner in which I proceed to accomplish and apply the same, the accompanying drawings being referred to by figures and letters.

Figure 1 represents a longitudinal section through a series of angular pipes forming a bend, the firstjoint showing a band in halves riveted on, and the second joint temporarily secured by an adjustable strap. Fig. 2 is a plan view of a sheet of iron with holes before bending. Fig. 3 represents a section of a band in halves. Fig. 4 represents an elevation of the same. Fig. 5 represents an enlarged elevation view of one of the straps, showing holes and slots for bolts. Fig. 6 is a plan view of the under part of a band. Fig. 7 is a plan View of the upper part of a band. Fig. 8 is a plan view of the under strap. Figs. 9 and 10 are diagrams illustrating the old method of laying out pipe elbows and bends. Fig. 11 is a diagram illustrating the improved method of doing the same. Fig. 12 is a diagram illustrating the improved method of springing a curve with a spline. Fig. 13 is a plan view of one of the bands, or a section, showing the improved method of striking a curve.

In my improved method of forming bends or curves in wrought-iron piping made of riveted joints I propose to save the time and labor required by the old method in accomplishing that purpose. In forming an elbow according to the old method the first step is to strike a semicircle, divide it into a number of (No model.)

ordinates, and then make tedious calculations in demonstrating, Figs. 9, 10.

My method reduces both the time and work to the minimum, while giving the desired result, and it not only saves time and work in the operation, but so simplifies the work that any ordinary mechanic may perform it.

In applying my method to laying pipe on a curve into four, five, or six parts, as may be required, and then draw radiuses through any two of these adjacents points, Fig. 11, after which I proceed to develop a section or course for the angle, as shown, Fig. 13. I now divide the diameter of the pipe into two equal parts, which will require the division of the circumference into four parts. I then take the line 1 on the pipe of the greatest width and place it on the section at A. 3, being the narrowest part of the angle or elbow, is placed on the section at C, and 2, being the center of the angle, is placed on the section in the center of the line of circumference B, and also at the ends B B, allowing for the necessary lap. I am now ready to use the spline ha parallel of about threc-quarters of an inch by threequarters square by ten feet long, (fi x it X 10)- with which I spring a curve through the points which gives the required curve for the elbow, Fig. 12.

The adjustable strap e is an important feature in my method of forming angles and curves in laying a course of piping made of riveted joints.

The manner of applying the strap is as follows: As soon as a curve is determined, a band,

I), conforming to the curve in its lower part,

c, and upper part, d, isput over the end of one joint of pipe, and the end of the next joint is let into the band, and both ends are then riveted. Where the course run conforms to the topography of the country and passes up and down hill, bends may be required on the side as well as up or down. By means of the adjustable strap, however, the pipe-laying may proceed without interruption, as the IZO joints of pipe are joined temporarily by the straps. An under strap, 0*, is bolted to the ends or sides of the pipes, as required, while the adjustable strap 6, having slots f in one end, is bolted to the upper part of the joints of pipe alter they have been adjusted to the curve, Fig. 1. As soon as the required curve or curves have been determined, for the course may require a side as well as an upward curve at a given point, bands composed of an upper and under section, Figs. 6, 7, are placed on the pipes and riveted. The curve required is determined,without any regard to elaborative drawings and calculations, by simply measuring the distance of the openings between the pipes at four points-namely, the widest and the narrowest, and the distance between the pipes at the middle. I then proceed, in the same manner as described for the construction of an elbow, to develop a section of pipe in two pieces, as shown, Fig. 13.

WVhen the section is completed, the straps which have been employed to adjust and hold the pipes to the curve may be removed, and

the joint covered and secured permanently by two parts of the band which are riveted to the pipes.

Having thus fully described my invention, what I claim, and desire to secure by Letters Patent, is-

An improved method of forming curves, bends, and angles in wrought-iron pipes and tubes, by drawing a few lines, Fig. 11, developing a section therefrom, as described, Fig. 13, and springing the required curve in the manner described, Fig. 12, and temporarily securing the curved ends of the pipes by straps e, by which the pipes are adjusted and held to the curve until they are permanently secured by bands 0 d and riveted, substantially as described, and for the purpose set forth.

In testimony whereof I have hereunto set my hand and seal.

' XVILLIAM J. BRADY. [L. s}

WVitnesses:

A. B. SMITH, FERDINAND IMHORST. 

